Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fdcd8bff86f943b40426d5a636cd405b5071645d741352ea3fbe3ec8019115a' 
  AND token = 'ZzSAcgLqUdm0GPvfdDXtB96SZCXLR1ymSqSozjg2G5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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