Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d627f959f442437cbcc5267dea9e9aa6bed7ea52c81587e315e02c28158da6b' 
  AND token = 'WNCwzA6SzI9iFEMUy4Qfo7NwDbdYxp0PbezbsiptjSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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