Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40c6f45364179bafe4b66109acadc2e0ed52e363257e5bab66e60c05f1ab47e7' 
  AND token = 'nNZdI66HNOaqiAFKTZYgD0PPq6XVwKuSBuupYnAkzCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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