Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3d1b18fca5c4b4586b90562de726414a4210323a75d972bb84c770bd428952f' 
  AND token = 'Mp4sJQNL/U1fvSpgtc68NpQ58MoXDLEp85KqJB+0xt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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