Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '435a0d69f4ed64ca07ada5df4fec01ad2ddf17cf9060474676111c19004c8b9e' 
  AND token = '0LC1HfVdJx7wlo3sTYyB09/5zwGSlvkY1LUk6UEqzmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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