Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '915fff21c93ddb800496867a575faa6138079b2c4b1fa94e5cfcf6372286f61b' 
  AND token = 'Ym0fCIFmfwFfYxieKc6TcKC1A7hNVnVAnytL037Pj2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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