Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e23ea0dd59d76a1b7abead7e5d6e74174614b86f18bd3580d5a16e3445044fee' 
  AND token = 'yMxEpUS+Qs8EQspOnGfHvqs/MDtEjfd+keIXLxGV+/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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