Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a5b1cff12eafb8ed4f62622d8281668d8fc9ebad7ceef6938368d53d14bbc95' 
  AND token = 'OW422AEOrbYzScmCpK6j8ANgDASXOMTP2SqazcddV6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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