Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12eb157ad4c958362c1653998f3496dab882f31085b097f20c39018598966c09' 
  AND token = '4Slu1UqaGYhekedNs7HGSDOgfhqSMY6m+sk50sNFj8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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