Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f04b7dda78a4e8b5ef2346155728d5eac3b14491eceaebb09bf70cf74c07df3' 
  AND token = 'FSMvrSfBVCvGjb3f3OV9umqT50dwdZHzCFSk7l2OMTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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