Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b107a7b78ee050077b5eabc459dc17360cb5ad9bc36eef7e956599c34540879a' 
  AND token = '+qnf17iAq0lJ+gPPaPyr08brKoLVD1Te33bcNrDpkYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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