Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b59d73daa0c963a201bb4e981180d1cd442c9ddec5e0f10c670c467c6ce78f13' 
  AND token = '+D6yt3xagFUxPU139A/ggv5qFprMEV3mqDcpp5F1hcE=' 
  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"
    }
  }
}