Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2ec5558839459b24f302467333ff51d324ca2e5f72c167314b755cfb4d26406' 
  AND token = 'FVoIyghlbMraPY16/bcAPa7IeqFgXgBDPxHiVRDu9Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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