Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd00ee3068be2e33d3ee2794a135ab883ab38a8a725d89822aea8db085202de79' 
  AND token = 'PiPo8UaBCwBIej1GbzQGgpbKfaRNhPGInXLXUB1j87A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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