Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75d33c328760a4b009a94d9dadf17b20e9f9c64c740c728d760c2e5039b69e8a' 
  AND token = 'ysVYUfskS1SWDBW41KUrNDvw6gktURMgyGakqbvi9KE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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