SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '571d34080d3b6ecf4374bc6d5bae1d78388864eb5f6bf6f7ca5fc842cb4e0d8b' 
  AND token = '9sqP6y7gF4t6uF9JUJUGhCWL+ZjM4HCHD+yy/9X38dY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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