Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '635362362803df035f861df7d181b2ab927f0a7dc81476d9ebc648cc68a1710d' 
  AND token = 'AymFC6t2XOIRx0wHqJmy4LHFR3EoMwaS+Q/9F38XREQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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