Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b0a38c316d8ef6627452b1aebd0c3f613f3f817fb2453381f873777854dbbbe' 
  AND token = 'HNha8qs3eHXGSkLqYmyAJm7ry1rMI+lfAE2+UOdWpa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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