Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4accc56b7e9f27a09fe13a2d7e181855fa08207e27956052274c9e430e2ba820' 
  AND token = 'PIPhrIrxPsz5bzyUEU5di6FB9/+aODG+9SaxAE+bhl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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