SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1da963370b2e4a4cac0b7acd120f510967888292b6e5334019116540796f8e72' 
  AND token = 'zgXF/U3qYYSv+8W+aGE8lwnsyH0QstCum/fi+pAyF74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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