Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bebbcb00266fd8d2baa5da0171c4f7f16cfa75cc163ceec3d2dde2da6bacc2f9' 
  AND token = 'UPULhCHhTVOHVQUtueo3827Yvv33IL/CnMvct8Cgaq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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