Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1882af1935a0c9620b99a20381fc3ac91bee97c84662fef81490819795724d35' 
  AND token = '3j2iWO9G2faXgDTZOsb44tMMW2Eq3ul6pMtX6ej+h6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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