Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd30fd031b62977296a0aca28581c9e83893a0aa1cb9249850901cad52580376e' 
  AND token = 'KpjbFqN14a4wF1VwPWnSmIeblBL1qrpF5JPbFVF2XEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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