Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58a7469dc7bd794e5160479ba623b13b5038b7b345c71ab909408c0ba6e0c350' 
  AND token = 'gMfarBtu+Ge6ZE3rFhf0EiBHFckL9GZt2AB5eQsWQuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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