Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5be581ba72c7c16cd9de10420573e73414cc5c6b791eeba218e5a14edc647e63' 
  AND token = 'pkVTYJ6kI5fLvMEnBDP1lV5QTa9UuEgwtjxbrVExg74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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