Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71347b8f4ca90be289e0bc79aa443186f55afe087477605da7d92181e36cdc40' 
  AND token = '8ILR6TV4BxjbZK5EiGqeIpN0x08XFhQru39xOznyM58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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