Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d0367ed6f950ccf3e274764c3bcc59dc62916a9eb847eccf566958c7911412b' 
  AND token = 'Jk3bkvFLEw+7542PYREyGXWlSpvThm/ErcFmaXKuy6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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