Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f6885c6283f66f363aa70948b51eba46d7fa07d5358f8ee99c9fad599652a58' 
  AND token = 'yWYue24BBDs9hp5E3ujUOEIRI/1ieHSV6OcmQbtuoOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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