Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9974476f9ceb76dd4836a391b389e4fde79aa27bb87f6af2d653310c0e497e65' 
  AND token = 'pMMv6lgWrjvxysAVAY5JEJf/ysQk3Bv+aiMNnQtGMEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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