Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7dc3c6fd120ae5a0cca267dd64e9aac4f11ca437183bcf739c6b5318c675373' 
  AND token = '6ZuoW80n2ynL13gDY20ZYDnoLo4GU+Gt2IhyWd1xi0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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