Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '410768c9ee4ba46a014ac33c710327f3fb16d42f3d405a9939ec3f0bf9d3085d' 
  AND token = 'w9k08RhM7oLCARbqdGXDq3XFbXGw3uoGtdxY4xQo8Aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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