Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3295ecf5597389206eaf7546a119ed425f49d4ded15a00c1cd016f149d66d25' 
  AND token = 'Y5OAYXb1+5/1Bi1FUtrGqsWELLfDJcHjwyEuOUuyMsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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