Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a9fbe8cc5ef73504722d11447dbf16584d17f45969ee5769d4a6a619e3535b' 
  AND token = 'hrZyNsudLuloRBbCgAK5GgMvkoOAubYpO9B0RRZ/ybg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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