Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd564c38de13897a32ed6347dd00336108a7021ba80304c768a051b548e61d82' 
  AND token = 'OIZbHo4iQl7e6Ni7uAQNm8ilikDy6V3p+DBB4keaOq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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