Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfc773f5aa2dec7512f8dc20c48ceac284a7413dc9ffcdb7d4647d121e728c4e' 
  AND token = 'CMC62gEV9RusyRmZkmZDVp9zjoNdg3bvQm/UiipXUds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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