Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebe624de60618be3118d78203a780ba33a620c016f8522f4769e9b1e570a40d4' 
  AND token = 'Nm5UzEtkzPhHtTa396JJ8IGaoz11DqF46eA+7EkaieY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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