Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d598aef3cdf458082c2e9133230b59eddc1a913912d4f0f97e76d79ba6d89c2' 
  AND token = 'X5lJSbUpjdgbWrpecBAw81zkOc3FaM4syQW3cv6ajxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}