Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7215d4bd01e3cd57026235f42035ca213aeedf8c7e4f30701cf3b08bb891e4ef' 
  AND token = 'rNJr1iKQB/qSCMP+maujVAgKoSIh7nMErYE7R3cF/CM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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