Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb1f92bcc2fd38728079eb1a1bc1ba2940880ae9e5a2aa2a8d462f32a2c60de7' 
  AND token = 'iegZ7kKV+MCJKWgEqDzBCOsA22hJyKOr+W3u9FfSg/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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