Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8df628ab88e375b2beb1c5012702d39f5b7d5e553f04eb7e7234902b8cc278f9' 
  AND token = 'Fomp063isqC0Yry/eVCtbenl0/GH/oLJpZNU4u3RLyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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