Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83a46164c82ee1c80a4b6be2396b888288602f26e1ba50329a0a46780472480f' 
  AND token = 'IALi6UAafWeCfLOCZRK5jobv0USHEvexLLejDIlb9Qo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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