Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5693dc9d5eff2653c38c2a6d967fbfec5206a77476e103cbd74e096a897cfd20' 
  AND token = 'fWTzrIz05NBwA9NBR32noH21LNwO83e3Wo7x1628gfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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