Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21a2fd5e98a34db00db62232edf71c42f0b44a101dfa62d8ced37ec96b3717d5' 
  AND token = 'g2UTjt1FS8+9jM3F9kzPBjUzHzX2A+99biyh/BB9OYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}