Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcfd3850e2680b4442a1e2ce9e1c4d3fa2ba289dd82d27cabd37b284d5601d0e' 
  AND token = '0+eG6YkwBSbCwZO4eLfpjKYwqluAi35lJlZBBevWS1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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