Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '104a34e03b1ed7293b70ded2a2a4875941b6c17b8fce68f30f1c1ab013dcd90f' 
  AND token = 'GokYxEX/xd9A6tUCWmNVCogiavGIclYB8mbgPXcplMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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