Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b11a193ca943cf22d6d415e696e532a78fb28f3d8704475a16e0c43e3f9ea4ca' 
  AND token = 'gxS6K66NwT0b9TwUqF4hR3Bk6bagKp+8JgKG1gFdvmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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