Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf12eede73ba999ccc0d67896a44626f73735ee8780eb153d20322f866e33323' 
  AND token = 'asv9Jplk50g37WDVmo5NPFqTWWSV6P8eJVaPGg/dCLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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