Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a1f3b7ed003ed963a4ca856023dbff4c34e8fc565a8ce0f7f128f15d75423bc' 
  AND token = 'bE146/HwjxOkJrfvu51Oo+ghPC/tEYiKqS+rg0OJ+ko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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