Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f948e365d613890253eb53a3b4700377dd6e7372c5aeb3c59ed00857ee4300cc' 
  AND token = 'kw9bJUSKRkKwKMa2MIUIshcwhiUp13A+yd4LMl3cWKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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