Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f8e26645608d1bb6dfcb5c2e45a5e9a0621e33e9183657d407b8515fa7ba7ad' 
  AND token = 'kS2XewYq19cQ7oQeUCUgOltP/yL4+VPZe955mlp2tqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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