Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f61f5d0f7b368f94214fb21a2eaa015cc9fb02b791a774478a512ca0c86c4d3' 
  AND token = '71yV7V07yvbM58x7U9JA9F9D84gHSz4LPnG0pJAFE7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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