Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f263e626ecdce8a2402f839cde53b457a11f084b70e77dac2896f06b05c7504e' 
  AND token = 'tGtFVf/pJfQNhWgj4d1JQAm0ubwTAr1EaWX8160eG9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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