Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf57be7cc00d5067867089028555bdb135052102d2873797c599ee6bc7d7d9fe' 
  AND token = '3p+2KzBg8fW2QGj2vx+zdwH1ldLJPdlnDfHGM/xe4nU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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