Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a306ca450323cff8affbfbc85ef0cf3b3c68342ad56cdaca21911d2c49d7d113' 
  AND token = '/TY0tnevfZmyCDeI5HeweYLzCPZe2fnJB7aD8HIfI8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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