Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1809d7b89fef62a6a168b2e287c31f54abe7808136a21e4378c5e4b3520240c' 
  AND token = 'pqNOuHmrQeTSb5UQi85ln4m+7yaVoCag+255UBuYR0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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