Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2dea7894702e4d4f35f92db4932ebc0ae1c3d45c2d4505a6f6d207a4f497609' 
  AND token = 'NQMkXd5ZYriFILUeF0w0OTjEVxr4IUZyqWDZ7NFlDic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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