Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '481ce1e3c72d4ae42a52aee2773cedae36646ec207556bfa9a262a6349287ef1' 
  AND token = 'Vm9eFDTChZ9Ykly29DcZDQEd5zldgSl1xFww9Av/S1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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