Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd24498f99c45091826238e66c64ff273d89651b074d49bfae88e4862441324f' 
  AND token = 'K7gJPf6meMz6ZxhuLCrhIFGC6141GTgGdrzVryMzVCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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