Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80553067a78dc7c6f2d67665d5aba00e8d4a261cf4ce4aea46f2cba197bbed0f' 
  AND token = 'XnBpLvLs7zKMAzmsf2Ja+dbBjSmZsIrR96YBNClVVFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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