Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a84d3613a163474d869cff6ea1063704a2f8ca7ca95357e07f00e63081a8d422' 
  AND token = '09XB2aemIJ481+LXVzYLQg6S04OrjXNwQzGl2h0MIFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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