Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6dc13d09c926cb4b901febaaf93c39e53f275527e66166c96ff18833fdad881' 
  AND token = 'hr1qNvD+CIQpsLaVMNDa1XP1rclhkb66zTak8YWAZCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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