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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a205f636ff1e0ede67999a1ee725de6ad8e7cb67d7bd9325c309ba370cb8b02' 
  AND token = 'uFVeeTIxjpxA9Edv1n3dvyAQkEHlV7dyWoyMY4iwM/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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