Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba11f1f164f1e5b1db7a640d2d36585a64192314e78c94915f9d83675458599d' 
  AND token = 'sxvZ0oPMRik329WmD86f/mNOxOymuY3Y/tt997CDso4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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