Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d30e0605d2bad788e528044cf82be7bdeb0122e8e207918b56d4aa87b82773c' 
  AND token = 'I8YI4FkDxN/oKx8yAMBXegnZD/rY/gUEMg62DwgfqK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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