Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73003b40b4793ee5ae4b2aaecc6b3982c8d2a21ec07fb0ac5336a23952cb9da8' 
  AND token = 'KzqgDzibdjLMV6celcy99ucGIHtLIcuV0eJxxAXSP9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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