Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd331fd9bd820c935854a8de2fc1a3b22f3f1a6b1fbbf0d631bbf58855d8c9569' 
  AND token = 'vzae4U/VQoSLk799/dnH+RvNvwsz49jLgkLy6kzQSBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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