Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4f921c7307cfb1921f97eb0011af7695f3409a6520ea730aca76927a4451c5f' 
  AND token = 'PQeVYSuM/KM8NDcoaDBhiwCGStC2ZTB3DnTIqbPXSzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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