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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07d83df52c3dd24ecb248e0de9d3882d87961eb444cc3b92939ef2dd56936cd3' 
  AND token = 'lwK+aKpQWIRpz0bOMdn5Y94CSI+CoghrkJ3f3A4Zj6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}