Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e363622a5f6a5b43b0de358de9b72ede8ba3f83ebc7e66754ad5fa06ce0108bb' 
  AND token = 'UJJ94BlWDvqaC7+L39Zj9eXQY5cpcN6HWuCOjOB/TwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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