Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86c7ff7db4ca0751d319f18da0cac026fb282581b6e9ae9890b57d55ab0ccf4a' 
  AND token = 'cMMyza3GFx84k0wO4Et/9K8E+ZeAZEXKbVE8benmOU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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