Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdf5aa5b0c00e4ca99dc3b8e8e9ad57b863621c4e90368a856d02cc30e9ef68f' 
  AND token = 'Wxo5Pq1+HFjxHGialWnbCdTy0rtJx9zeisXGP2d3GiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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