Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be96eba546263a9000b35fb2ac05b265677d47f54c2b2f16407a1ea2938c8ee7' 
  AND token = 'r5cU7bjsb65ExNzfFYtr/dJspeZ2D3OCxa3/mi8AaXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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