SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07c71929ef06ffdb1e97ee8e2332e928d3544a0d595a53335052351b33de9872' 
  AND token = 'IVuVcfQIomR+/sexhsIQh04TupzqtzcQvlcZYTjXWmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}