Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26b9643ac9d8c74ddab6c066bec99bb4c7da71b9cf6f51661c747b99a0934e27' 
  AND token = 'LeHi4pcXnrsuO9NhJPdUdlAGdaR+KaXxujTEYyykjmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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