Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35cc479b63461cd751e0cd936969a6fad876572212f56a1e7aef2a605e12e2df' 
  AND token = 'h+MXCM/DT4sL9yZwdYn3vAo6MagKrh/UlltylZ4XSP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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