Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '954b9058176e7c4113f3210b35a75a0b7d4310df8d5f9ec66440f1848dfbaa6e' 
  AND token = 'gW4kyAS10X+7L5F2aXE2xygZqTUxVidRZuVMYvL2KbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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