Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bf4032c541a9191a3ff3b4edbc4a37cb9f6c07b4c0eb1b9c371418ddffa84ab' 
  AND token = 'HdF+//R6KK4ZDUFildcmxnr72JdVNbJiO0Uu2iloEKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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