Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5cecfb643d77ec3a4e5591305644af1d45394e5b8a71b75f77bcc202ebbe543' 
  AND token = '9aradto+L0JoP+nnoVcwiRky8sQBFKyJMR2/Do+qczk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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