Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c469ac780b2fe2008ba2de2285f778a75504b96ddd80f30894188745929be77' 
  AND token = 'XSldjCB0lCYS3FShgnyfGR+EmegCAA0qd/0GsfBOM/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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