Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6383288771e56a69e84187c25ec94a0b77cd2429a547072e2dc4452d8aeb519e' 
  AND token = '3op+yyKk5qc4lymCPAvsj2UhSJp/G2ZbMI7zao+GHBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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