Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f32f13970447f4a1b5e5805a76da0eab3fe9df6e6da3a543b81df2e3766a29a' 
  AND token = '055fFBka6kv6B99bF95411WYMkl0zkq48WWwYXN6QtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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