Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '999c648cb164df462e6bd842870c0e01891abcf4e3620bd9d64b3461c01bf404' 
  AND token = 'D8LhDzM6TY+5B2egOb2ABglwOQhKjhuiyg98I185T7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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