Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3219e941fda3e119eb674898cf8d33029ecbe138d4c1b2a07d02e3042daea596' 
  AND token = 'uaGWYHVepYnw6kGlPbTeZA+DJfQxaLSwhFtnVI/NamU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}