Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '93c67728e9e033ad4455f69bbce79356371ba2a67c05f120a57cb65ff78b2c56' 
  AND token = 'DqJ1KPyGE7Aaap5AeLegKD6REkaHw7T92BHXc+09fH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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