Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf9583e609bc6cb39f92e1537b52371cdc73146b5b28def5f0c39a73a4098aa9' 
  AND token = 'FhlfX/avhVfnNZNEiDzXy9SMFiN/GS5Rs9vq/b2t2gY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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