Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42b98ef177127df7886260b17ca68d4c0d1c093c252ac1a7e09ec16ecc5306af' 
  AND token = 'gOoIEx5t9+sOH66IVrA028Ggw3deRHJUKYIr2pEz+BU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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