Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d4cc47dbee406fe0d82a3357733f05111db118c4b81aa6b5c1ade0a80fe8374' 
  AND token = 'kkQ5L17ZB8zdrHCAmw8SaARj4NyAQPvEnBYgY7m7lBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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