Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '898b2c12fe20e2b15a5d00e5e16dabfe03384b155cac611a001243eb52862c95' 
  AND token = '4UyRrJbmz2h1AyMuvvkbOgnyH0cmCE4w8FhzmIwrl90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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