Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '345c88af037cb173224124061fc6045b60c282a9dd1a93ced7f5b23fcccc4ab3' 
  AND token = 'RJVAxIKkwkyE6gpbRF1m4wKzkoobXLdEdVtCkAY6eJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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