Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f41a412731f971d02926248c2d09f307e3088bb9743d6140db764ec00ea8dd54' 
  AND token = 'kqfU/ShU6wCE+/37+2AE56Jkalr2BBo2niB9J0/IdgA=' 
  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"
    }
  }
}