Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32c1c083f089df0f2be6af1bd56ff4d2b6d1d9db0e3c39378aef65b2cfb2edd8' 
  AND token = 'KJhivVY7KHjgpknCbSQuPBdfr6QCSvAhaUk8fVDrQyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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