Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1c4c13144924e43d8a3fe1806a17997754c1c99574ada3af05abca4cc5f805b' 
  AND token = '53YPzDfGBdO7xR7cVIr/dS/aJbqAOI16H+rwxLtum1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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