Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e20a26fc23d45c913a9477ff42460e6f91fc0c48f075159e2d60eb91efff4b2' 
  AND token = 'zOtLmwwGpW6z7zzYES9i6UAZkWiui1ZN14Zw+ipU+/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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