Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '581723ddaa0137e5d09aeef1988c46478b9ff0664b6854e023cc5b74b44bdf5d' 
  AND token = 'yKAyRJ73BGgH8H/bRAOk3+htPPgc4U62UkUCsAPF/Q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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