Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4282e05110e72d0872460bd329598885950f1d11f589be8ce1875617233039bf' 
  AND token = 'l70IDe59NHDC0bVxivemUnCDSwLhBaesiEW2cYUnz4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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