Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3401c82a451a61f17984f8f814246dc017aa838830035a6a98298233e23d9eaf' 
  AND token = 'tYSj7OwqE2efCtF2fdT9gsf479rjFp3ZU4fdabKfjFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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