Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d05f0915de30b30e9c195ec1d73f302471c6216971b74ab412b49a53191480d' 
  AND token = 't6AETgQvFta+J/D6csfsZYNz0ORpuQbnmRTxaw5Aa2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}