Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e84a9e354a52280a563eecd14a4b1161092d359fa2bd9d2ebd8f5a9bc0025743' 
  AND token = 'g01xbBfEC4GNxLczPqJiJZTv0cN4V8WhI4bD09qjm+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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