Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e332f2a121e8a607b7621951161002970862ef3d0be510e2922122cb3cb3eea' 
  AND token = 'XkSppws8gvrKY3mZV3ofhP7rCUPg8vvd/K7GxOPKcBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}