Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6532e669edc736dd6142d68d088feb1f973be62b6291a43cd8c80ceb3c1158ad' 
  AND token = 'b5JzTAxyOpzPCbgixv4s6PFhBLmAYgRbbdHmcP8CSZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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