Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41543276aa7f8e2c67eaf351b467de56b4a767c0aac10383d3aeeb31f2316057' 
  AND token = '3jGLPI6w20WVTJ/UHMeUTbRBwgPOXTEv7OwbWYzVRhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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