Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f444a63e1698549407dadfc1560b58799f312d83290b844d66de3e8dc5014af8' 
  AND token = 'Xc34cAY9/joZOY/SQufLCiw0obIugM3i7mPIYkJU2Mc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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