Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efe4c55dacacb86215087196885cacce1fcd30e864ca3c141ec7f06186d1ff72' 
  AND token = 'kCGVwY06CgqB6desaO+nqGb2kkwEA4lDJLlYk6qcUL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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