Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97edd8b3aa5539c03a38d3092c09448f6336d51909b2a2f53e9173b14ef91f6b' 
  AND token = 'iqMJKE1rA60pNfsD2SqkNYg+ER7kpC4kr4DjUPZoeJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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