Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d105485719bd61e8d66a72c8529ee3faaa24da2ee4eab87907a754571a4f075' 
  AND token = 'DlO7loLnezGKYCQ7LOst3/oPDNp3USuNIhF1/xRD83I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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