SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bb373f3f0b3e24d693da8426a98d9a573d8d531e2e101ef637dc4de21bf2190' 
  AND token = 'rs8nBwNRpmg95pdoUVqj/JzpLMkXPYZ0h6kUElee6mU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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