Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b77e854db41e5509404ee885fcb955374991b336c20ad8d3509dd67cca6dbe4b' 
  AND token = 'D/GtgF5tb/1DqU9l+MlHlOp94N8JPqJbJMXL34QoDWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00297

JSON explain

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