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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e03c92a80058ca9fbab060e58a01fe999b2fbb33c8d48d94853d5b6fc6e1e1ef' 
  AND token = 'zt7oyQk2RLG1feZq3ScVcHjDdU0fftG+1Mq10nA+bs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}