Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf86bf2bca1d4ad78e36ecf338a1882e7216a08f7becebe2f5e409d7226a8662' 
  AND token = 'bkvGktjCKvGYQEP0JO65U20ec4eQWbUWqWQDKyQCOHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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