Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97d68f776cf699ff89dea3ccdd1823af4ebc694db5ef15f0298d75e4271f6e18' 
  AND token = 'aKb55IBxz0yOled+jTGa5pFZ8u9ecfCLhD3rdBAG0fc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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