Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e68c81461e15365a8d9024fb676ea9c0ef2caeea193f9a1db811bc79e8bf8e4' 
  AND token = '53ATLJ9uhzdGB8N4Q31H2hYkXBQsl9uf3vyV1w/wMHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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