Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c6a09864077943e5f3da5f4ac5888c2b6a285c4abb15d808ecbaac78bab8bb' 
  AND token = 'rSNteIGu9J5MEf5OXS7KwZuyYryJ700c5PXZufVh1h4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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