Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7765471fbc59dd2d6f88eb51c086ac661121f1dc32e181617d5f9583ada8b0f7' 
  AND token = 'xsLTQL2v9QO/tail7Op3lL7KhI4CXiT1TkLmfs0cX3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}