Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e1a903097413deb539a0d9cc22defc1c7dc3e6a328737e0924e8ed423d9815f' 
  AND token = 'uCQvgHO4VYNgrnQCDrnmcFe6/PvSVCSLFeCxo9xxJ5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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