Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ce3711078bc764a5aea68da4de92932bec320f5365a6e9b5e6d85faee5712de' 
  AND token = 'jRIfDoT7LTMgu6dYdn2m6HKb3I5idOJ0kl9COSVJzbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}