Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02de68824ed6f64ee01f742917762271bdf226eae38daf4367d82b310a010b7a' 
  AND token = 'ZEQ9kyWQum8SsovU0646TbnQDcoulSnXi3/3vb4+Y9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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