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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f33c17370fbf2e11594f59baf9e00afcb515165a991904268f4d22ad11c62e0' 
  AND token = 'VnwV1eBW8TheKLtEU/iN3uzT8Pv8xrVmvyzdKibrOIE=' 
  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"
    }
  }
}