SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '056f16fa8b2aa42a1ee28c9c7ef863596fbe9a9d1f986629b5653221fdd84f7d' 
  AND token = 'WCj4PX+nyxoDD/yjzqcOm2zT/6gWK10eQhYxkdFntoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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