Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec9b89e1f57526046cce6d49504dc4f10909d62f6d71aadbcbf545745f23cdf9' 
  AND token = 'xUhY36Rnvuz5YXhQRQVKG52dblQacOXaEOYQgtv/fcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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