Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa13c6a1770fa3dc032ef5101dc9b33d3a3c8c8bf0a4bc18604aef66b8df3f15' 
  AND token = '1z+pD4rcek8vfX1JroDguQn3sWR2BYy69rmmXhZY3C8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00118

JSON explain

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