Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '274b557491369a0858a2dc071f205f0cfc0b5f71015ad7c5958748736827316c' 
  AND token = 'fqerdGf55QDPXbQo3s9QCqwEKg7+ScfSNCdOgIWBhSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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