Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1457db0b289076ea705ddf3049c495843491da939bfeee74bd491c7560e0576f' 
  AND token = 'a7BdSUdgNnpxdDivruT/EHEPTyZnsvDvAU1Rucjib7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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