Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '270fbca237bce621d4167c162b1790c946d67666af815d55015441c085299dc2' 
  AND token = 'MwKEL/DFB2cBoKa6Q6u26863e/dyb6RKyldDsZA+bus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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