SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cac384ee7c2eb5461b288cc78edcca30a5d9489859528ff694881293b78cf96' 
  AND token = 'cdQ+ywPaJj+CZw+m6z/cJixcDNyKzf+vMDLuXVbB54s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00096

JSON explain

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