Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '336fa166cc65362ce6804c5053c4f6b1a00e8c2804e246a1b75abb91b48127ca' 
  AND token = '+2IUQ/DPhPnrwgksw9Fhq2fbw/PtL2bod08UUfr32b4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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