Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dda30d29faccee6ad0094a2c238476af7d8f60888469cfed1bd0cbd61b6ee229' 
  AND token = '8Ub2pAhN8N7c8B0gS2xAeEuV9Lv+idQP0pjFyUCeOiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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