Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afa0feba322f8c3393ccdc070a174e0df62d0040315ed7dc6a0ba42cdcfe23a9' 
  AND token = 'D6LSNug/8cYGa0a0FUAXDMWaMloW5Hpnn1uwWAjNrX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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