SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5776b87a9e444259422df7e1d798eab3a6b60a87b4ab12f60ac78b67dfa940d5' 
  AND token = 'YsdxlvhOpdKulTAS6ymhalgg++5Z1lG+4q+fs0wAZ/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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