Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ef8da673c6f4cc38e56f4ea0bc25b28ddf6079349ac1a035f3a0589fd625336d' 
  AND token = 'QcAMDEDxdsx8YCCeXNNw11j0/zfirIxUhtpchCVWbvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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