Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe73c68f80f49335698befa4e6ecd4774cf9a351b2f80f34ec9e3a509b57cade' 
  AND token = 'Q7K6ZWLgyQyynrP9bW2X3QkisN24onV9TGwdX6EWBro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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